Water gun



FIG. 1 is a perspective view of a water gun showing my new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines are for the purpose of illustrating portions of the water gun that form no part of the claimed design. 

CLAIM The ornamental design for a water gun, as shown and described. 